Safety lock



June 1 1926.

V. J. M. BRAS SAFETY LOCK I 1:1 Yen for a Filed DGO.

June 1*, 1926.

1,587,108 V. J. M. ERAS SAFETY LOCK v File Deo5 1, 1923 2 S. cs-

! g 3. eet 2 I [nyanhrz Vin :en Josep/1 /Varz' Eras lli Patented .l une 1 1926.

Ubl'l'E STATES PATENT QFFCE.

VINCENT JOSEPH MARIE ERAS, OF DORDRECHT, 'NETI-IERLANDS.

SAFETY LOCK.

Application filed. December 1, 1923, Serial No. 678,010, and in Germany August 28 1923l lily invention relates to an interchangeable satety lock'ior safes in sate deposit establishments, and for like purposes, said lock comprising a main or oliicials bolt, a secondary or renters bolt which blocks the ornier bolt, both of said bolts being controlled by springless tuinblers, and an auxiliary or 'fastening bolt for securing the lock to the posts ot the sate door, or the like. The invention has for its main object to enhance the security ot such a lock by improving the lock members not only of the renters bolt, but also both ot t-he oicials bolt and the 'fastening bolt. Another object ot the invention is to so fashion the lock that despite its minimum requirement of space, all parts ot the lock will be contained in the interior ot' a lock casing common to said parts.

With these and other objects in view my invention consists ot a novel arrangement and combination of parts as fully described in the 'following description and pointed out in the claims. Reference is made to the annexed drawings which show, by way of eX- ample, a preferred embodiment of my new safety lock. In the drawings Fig. 1 is a front view of the lock with the cover removed, the main-bolt and the secondary bolt being locked,

Fig. 2 is a similar view with the secondary bolt unlocked,

`Fig. 3 is also a view similar to Fig. 1 but with both bolts unlocked,

Fig. 4' a view in section on theline of Fig. 1.

Fig. 5 is a view ot the lock with the cover, the false bottom and all parts arranged' at the front ot the latter removed, the figure Sher-Jing the slide which holds the lock-case on the posts ot the door in its operating position,

Fig. 6 is a similar view but with the false bottom inserted, the slide being in its inoperative position,

Fig. 7 is a view in section on the lineB-B ot Fig. 6, and

Fig. 8 is a view in section on the line C-C ot Fig. 5.

1 is a false-bottom fiXedin the lock-case 3 by means of screws Q, 2 and staypins 4, 4.

is the main or oiicials bolt, andA 6 Athesecondary or renters bolt. The two bolts lie in one line. the secondary bolt 6 being arranged at the back of the main-bolt so that the latter is blocked-by theijormer. Con- SeQreDtb/jat first the Secondaryboltjandtthen the main-bolt must be moved when it is intended to open the lock. Furthermore, the lower halt' 6a oit the forward end of the secondary-bolt 6 projects into an angular recess ot the main-bolt. 5 in such a manner that the corner 6b of the bolt 6 lies in the locked position of the bolts close to the stem 18 Jfor the key .of the main-bolt. rlhus the said key, when inserted through the pertaining keyhole cannot penetrate completely. The head 7 oi the main-bolt 5 slides in` an Opening ot' the ledge of the lock-case, while the bolt at its rear end is guided by a pin 8 iiXed to the false-bottom 1 and engaging a longitudinal slot in the bolt. The secondary bolt 6 is merely guided by two pins 9 and 10, the one 9 being fastened to the botom 1, the other 10 to the back of the bolt, said pins engaging longitudinal slots in the bolt 6 and in the false botom 1, respectively. The main-bolt 5 is controlled by a set ot' tumblers 14 devoid of springs, only one of these tumblers being shown. The tumblers 14 are pivotally mounted on the pin 8 at their free ends they are provided with a stump-slot 35 co-acting with the stump 15 of the bolt 5,. The tumblers, which are held in the locked position by their own weight, are formed with two key-sweeps 16, 17 arranged at opposite sides of the stenr18 so as to face each other. For setting `the tumblers and 'simultaneously moving-the main-bolt 5 a key 61 with double bit is used, the longer bit co-acting with the upper sweeps 17! and with the notch 62 of the bolt 5, the shorter one with the lower sweeps 16. Thus the tumblers, by rotating the key, are always `exactly adjusted to their unlocked posit-ion, lifting of any tumbler above this position is impossible even it the key is rotated roughly. The key 61 is inserted through a key-hole 63 in the cover, this key-hole, which isshown by dotted lines in `Fig. 1, lies parallel to the sliding direction ot the bolt 5. In order to prevent the tuinblers falling in vfront of the key-hole and consequently closing the same, which otherwise might happen if the detached lock is inverted, the rstump-slots ot the tumbler-s 14 and the stumpY 15 of thebolt 5 are so arranged with respect to eachother that the stump 15 remains in the slot 35 also in the locked position of the bolt 5 so that the movements of the tumblers are limited at-all events by the` stump 15.

For vthe renters bolt there are provided. bythievetea tWsLgrwP-S-Or sets Off ing;` respectively pivoted on pins 9, 23 secured to the bott' n'i 'lhe two groups are respective y provided with oi Jositely-it'acing` key-sweeps titi, 6"?. 'l`he pivoting-pin ot the lower tun'ibler.N 2l is positioned substantially in the vvertical plane ot the key-pin or key-tud axis, or sliohtly to that side ot said plane which opposite to the pivot-pin 9 ot the upper tuinblers 20. lvloreover. the lower t-uuiblers /Ii are provided with er:- tensions rearwardly beyond their pivotal axis, over which extensions the key-*sweeps (32' are iorined. The vtorni oi both groups ot tuinblers is so designed that they can always be returned with certainty to their arrestii positions by lgmx/ity action. In order to prevent the tuinblers 20, 2l troni being,- thrown beyond their releasingv positiei s, should the key be turned t uickly, the tuinblers .20 et the upper group are provided with rearward extensions o arins 2T.

.Vhen the tun'ibl-ers are correctly displaced, these downwardly directed arins 2T engage the rearward extensions 2b' ot the lower tuinblers Qi and thereby linut the rotary movement ot both groups ot tuinbiers. To prevent the tulnblers 2l troni telling in 'front of and consequently closing;- the keyhole G8 it the detached lock is inverted, these tiunhlers are below the stunip provided with a nose 69 which abuts against the stuinp when the position ot the lock is inverted. lilith the upper tuinblers 2O special means tor this purpose are unnecessary befziusethe iuovenient of these tuinblers is limited by their a 'ins 2T abutting` against the arnis Q6 ot the lower tunibiers Qt).

already stated, the turni lers for the inainbolt are held in their ui locked position by ineans of their own weight. lesides this, a lever SO, 3l is provided which blocks he t-uinblerel in the said position. The lever Btl, ill is mounted on ay pivot Q9 tired to the false bottoni l, lts longer zrni 2,0 posses.s at itsl tree end a horizontal projection or tinp'cr 32 adapted to be pressed on to the upper edges ot the tuinblers il when the bolts are in the .locked position. rl`he other, shorter arin 3l. ot the lerer rests on the upper edge ot the secondarv bolt 6 which is provided with a recess 33 so as to torni a cani-face tor controlling the lever 30, 3l. The bolt ti being locken, the lever 30. 31 is held in the position shown in Fig. l by the upper edge of the bolt ti in which position the linger 32 presses upon the tumblers il memos so than the latter can not be lit'ted. By nioving` the bolt G to its unlocked position this Jressure is re eased again so that the tuinoiers n'iay be adjusted by the proper key, the lever Si), El being then tree to turn about a certain angle because the arni 3i can penetrate into the recess 3.53.

@ne or incre of the tun'ibl'trs of the inainoolt 5 have the inner end ol the stuinp slot 35 provided with a recess which is so shaped th: t the stinnp l5 can engage in this recess when the bolt 5 is in its unlocked position. whereby the bolt is held in this peeition by nieans ot the nose 35" Ytornied iy the rec-ess 35a, sec dotted lines in Fig. 'lhus,

the t l locked in l one hand, the unlocked bolt is pre- 't'roni moving arbitrarily into the ritieni, which niipjht otherwise hapi'lrawer or door is shut roughly relied lock is held with the head ot the bolt dow iward. On the other hand, it is in'ipossible now to throw both bolts forward by means ot the renters key only, on the contrary, to ad yance both bolts it is necessary to litt firstly the turiblers 14 and to shoot the main-bolt 5 by inea. s of the oiiifiahs icy, whereupon the secondary bolt. can be thro vn forward by the renters key. It might be possible that the tuinblers 14e stick in Vtheir lifted position, so that the stunip 15 ot the unlocked bolt does not engage the recess 35u. Nevertheless, the bolts 5 and 6 cannot be eonnnonly shotby tho renters key, because a'i'ter a slight advance ot' the bolts their nievenent is deadened by the lever 30, 3l which is then blocked by the tuniblers 14 restinpT with the noses 35h on the unip l5.

The operation and handling' above described i as Jfollows:

ln the looked position of the bolts 5 and i shown in Fig. l, the main-bolt is blocked iy the secondary belt 8, and the tumbler-s 14 t the former are secured in their locked position by the lever 30, 31, while at the saine time the corner 6b of the forward end ot' the secondary bolt prevents the enteringn ot the oti'i.cial"s key. To open the lock` at lirst the secondary bolt (i has to be unlocked by rotating the renters key tif-l. about it turu (se, Fig. Q), then the key ren'iains in the lock until the bolt is shot 'toi-ward again. The secondaryY bolt beine; retracted, thc` lever 30. 3l is 'tree o turn, while the blockingY action et the bolt 6 on the main-bolt 5 and on the otlicials key tSl ceases. The latter key is new inserted in the key-hole 63 and it can penetrate completely so that the main-bolt 5 can also be unlocked by rotating said key a. halt turn. This being done, tbe oliicials key may be taken out and the door ot the sate can be opened.

In the locking operation the movements of the holte are eil'ected in a` reverse order. At first the inaiirbolt 5 is shot forward by ot the lock the oliicials key, which then has to be withdrawn from the lock, wfhereupon the renter advances the secondary bolt 6 to its locked position, whereby the main-bolt is blocked up again by the secondary bolt, while the tumblers 14 are again secured in their locked position so that the lock is well prot cted now against unauthorized opening. The secondary bolt 5 being shot forward', the renters key can also be removed.

The lock is detachably mounted on the door ot the safe or the like by being hung on tour posts 42, 42 which are screwed into the door. To t-his end the cover 8O and the bottom 3 of the lock-case 3 are both provided with four circular holes 43, 43 which allow the lock-case to slide over the posts 42, To hold the lock on said posts the latter are provided with lateral notches or grooves 70,. while at the back of the taisebottom l of the lock-case 3 an auxiliary bolt or slide 40 is arranged which, with its longitudinal edges, engages the said notches 7U of the posts 42 when the slide is in its operating or lining position, see Figs. 5 and 8. This slide is directly guided on the back side oit' the false-bottom 1, while at the same time it is provided with stay-pins 7l bearing and slidingon the bottom 3 of the case 3. Furthermore, the slide 40' possesses a puller 4l projecting out ot' the lock-case 3. By means of this puller the slide can be moved to its open or inoperative position shown in Fig, 6,. whereby its longitudinal edges become disengaged from the posts 42 so that the lockl may now be taken oft. Ot course, at one end of the slide 40 (viz, the right end in Fig. 5) the longitudinal edges thereof must' be recessed so as to 'form passages 72 to receive the posts 42, whereas at the other end (viz, the lett end in Fig. 5) .of the slide is so termina-ted that it uncoversI the openings 43 when in its inoperative position.

The slide 40 is secured in the lixing position by means ot' a lever 47 arranged in a window-like opening 46 of the slide. This lever is mounted on a` pin 45 at the back ot the false bottom 1, while it bears and slides at the. same time on the bottom 3 of the lock case 3 by means ot ai stay-pin 50. T he free end. of the lever 47 forms a. stop 7 3 against which a nose 5lv provided at thelower edge oi$ the opening 46 abuts, when the lever 47. is in the position l shown in 5, thus locking the slide 40. Furthermore, the lever 47 possesses' an inclined slot 48 engaged by theV pin l()` of the secondary bolt 6 already mentioned which projects through the longitudinal slotI 7.4 inthe falsek bottom l. By means otthis pin the lever 47 is controlled bythe seconda-ry bolt 6 in such a manner that it-is held in its lowest position l when the secondary bolt (iis locked. By retracting` the secondary bolt tl'ife lever is rocked into its highest position Il, marked by the l abutment for the edge 75 of the window-like opening 46. Only in an intermediate position ot the secondary belt 6 the lever 47 is at such a level (see Fig. that. the slide 4) does not abut against it., the slide may then be moved into its open position, shown in said Fig. 6.

The lever 47 serves also Jfor blocking or arresti-ng the renters bolt 6 when the fastening bolt 40 is in its inoperative position. To this ad the opening 46 in the tasteningl bolt is made so narrow at its front end, that is, on the lett o't the edge 75 (Figs. 5, 6), that when the fastening bolt is withdrawn the lever 47 cannot be rotated upwardly beyond the position shown in Fig. 6. Hence, while the fastening bolt is inoperative, the renters bolt cannot be wholly retracted into the lock, as is necessary in order to close the safe door. This door can be closed, on the other hand, only when the fastening bolt has been shot in its operative position (Fig. 5).

Besides the lever 47, a cylinderor barrel-lock 54V arranged at the back. ot the lockcasiug is provided tor locking the slide 4() in its lining position, this cylinder-lock being, like the handlek 4l, accessible only after the door has been opened, the key appertaining thereto is in possession ot the bankdirection. rl`he inner cylinder 54 of the barrel-lock has an arm 55 which co-acts with a nose 56 provided on the upper edge of the opening 45 ot the slide 40 in such a manner that the arm forms aI stop for the slide when the inner cylinder 54n is locked. At the same time, the arm 55 serves to move the open or inoperative slide 40 ba-ck to its fixing position by rotating the said cylinder.

The cylinder lock is so arranged, in a man-y ner known per se that its key can be withdrawn only in the locking position ot the inner cylinder.

Then it is intended to disengage the slide 40 from the posts 42, 42 the cylinder-lock 54 is firstly unlocked by inserting the pertaining key and rotating the inner cylinder 54 1/4 turnrin the direction of the arrow ai, whereupon the secondary bolt 6 is shot back halt its normal path as shown by the dotted lines in Fig. 6, so that the lever 47 is turned into the intermediate position shown in thev same figure. Then the slide 40, by means oi the puller 41, is thrown into the position illustrated in Fig. 6, whereby its longitudinal edges become disengaged from the posts 49. so that the lock may now be detached. Of course, before removal of the lock, the renter7s key must be taken out, since its handle willnot pass through thel keyhole in theV safejdoor. To this end' the nasales arranged abovel and in the plane ot said secondary bolt, the upper edge ot the latter being recessed so- 'as to iiorm a cam-face adapted to control said lever.

6. A safety-lock comprising in combination: a loclecase, a main-bolt', a set of tumblers devoid or' springs for locking said main-bolt, a stamp on said main-bolt and stump-'slots in said tumblers, a recess and a nose on theupper edge ot the stump-slots oit some et said tumblers, said recesses being adapted to be engaged by' said stump when said main-bolt is in open position, a secondary bolt arranged in one line with said main-bolt and adapted, when locked, to block said main-bolt, tumblers also devoid of springs for locking said secondary bolt, a doublearmed blocking lever pivotally mounted in said lock-case, a linger arranged on the forward arm of said lever above said tumblers of said main bolt and adapted t0 press down said tumblers, the rear arm olf said controlling lever being arranged above and in the plane of said secondary bolt, the upper edge Vof the latter being recessed so as to form a cam-tace adapted to -coact with said controlling lever.

7. A safety-lock comprising in combination: a lock-case, a mainbolt, tumblers for locking said main-bolt, a secondary bolt arranged in alignment with said main-bolt and adapted, when locked, to block said main-bolt, tumblers for locking said secondary bolt, posts for attaching the lock to the door, a slide adapted to engage said posts and to hold the lock on the same, means for blocking said slide in its operative position, said means being controlled by the said secondary bolt.

8. A safety-lock comprising` in combination: a lock-case, a main-bolt, tumblers Jfor locking said main-bolt, a secondary bolt arranged in alignment with said main-bolt and adapted, when locked, to block said main-bolt, tumblers for locking said secondary bolt, posts Yfor attaching` the lock to the door, a slide adapted to engage said posts and to hold the lock on the saine, a puller on said slide projecting out of said lock-case, a lever for blocking said slide in its operative position, said lever being coupled to the said secondary bolt.

9. A safety-lock comprising in combination: a lock-case, a 1nain-bolt, tumblers for locking said main-bolt, a secondary bolt arranged in alignment with said main-bolt and adapted, when locked, to block said main-bolt, tumblers for locking said secondary bolt, posts for attaching the lock to the door, a slide guided in the lock-case and adapted to engage said posts and to hold the lock on the same, said slide possessing a window-like opening, a lever arranged in said window-like opening and adapted to lock said slide in its operative position, said lever being coupled to said secondary bolt in such a manner that it unlocks the slide when `the said secondary bolt is thrown back halt its normal path.

10. Asaf'ety-lock comprising in combination: a lock-case, a main-bolt, tumblers for locking said main-bolt, a secondary bolt arranged in alignment vwith said main-bolt and adapted, when locked, to' block said main-bolt, tumblers for lockingv said `seconda-ryl bolt, posts' for attaching the lock to the door, a slide .guided in said lock-case and adapted to engage said posts and to hold the look on the saine, blocking means controlled by the said secondary bolt and a barrelor cylinder-lock arranged at the back of said lock-casing for locking said slide in its operative position.

ll. A safety-lock comprising in combination: a lock-case, a main-bolt, tumblers for locking said main-bolt, a secondary bolt arranged in alignment with said main-bolt and adapted, when locked, to block said main-bolt, tumblers for locking said secondary bolt, posts for attaching the lock to the door, a slide guided in said lock-case and adapted to engage said posts and to hold the lock on the same, a nose on said slide, a puller on said slide` projecting out of said lock-case, blocking means for said slide controlled by said secondary bolt, and a barrel-lock with rotary cylinder arranged at the back of said lock-case also for locking said slide in its operative position, said rotary cylinder carrying an arm adapted to co-act with said slide nose, said arm being so arranged with respect to said nose that the said slide, when in its inoperative posi sion, is forced into-its operative position by rotating said rotary cylinder of said barrellock into its locked position.

12. A safety-lock comprising in combination: a lock case, a main bolt, a secondary bolt arranged in one line with said main bolt and adapted, when locked, to block said main bolt, two horizontal keyfboles in said lock case for insert-ing a separate key for 'each bolt, tumblers devoid oit springs i'or locking said main bolt, two separate sets ot pivoted tumblers also devoid of springs for locking said secondary bolt, said two sets ot tumblers being respectively located above and below the pertaining keyhole, the pivotal axis of the lower set of tumblers being arranged substantially in the vertical plane lof the latter keyhole axis and slightly on that side of the plane which is opposite 'to the pivotal axis of the upper Set of tumblers, rearward extensions on the tumblers of said lower set, and oppositelyl facing keysweeps on said two sets of tumblers, the keysweeps o said lower sets of tumblers being formed over said rearward extensions.

13. A safety lock comprising in combination: :i lock Case, a main bolt, a secondary bolt arranged in one line with said main bolt .find :idzipteih when looked` to block said iniiii. holt` two horizontal keyholes in said lock @use tor insel-tino; u separate key for enel) bolt, tumbleis devoid of springs for im;l;iu seid nmin bolt1 two separate sets ot' pimieil tnmblers also devoid of springs for lookingsaiid secondary bolt, said two sets ot' tuinblers being respectively located above :ind below the pertaining` keyhole.I the pivotal axis of the lower set of tuniblers being arranged about in the vertical pleine of the letter keyhole axis, rearward extensions on the tuinblers of said lower set7 oppositelY l facing key-sweeps on said two sets ot tuinblers the key-sweeps of said lower set ot tuinblers being' formed over seid rearward extensions, and also rearwzud extensions on the tuinblers of said upper et, said latter extensions being so arranged that 'they :ibut against the said extensions of the lower set when both sets of tuinblers :ire unlocked.

In testimony whereof I atx my signature.

VINCENT JOSEPH MARIE BRAS. 

